ok i just bought crate engine from jegs the chevy 350/290 to replace my old tired engine i want a rought shoppy idle for my truck. the truck is a 1979 gmc classic sierra. it weights around 5300 pounds with me in it. i'm have 13 inches of life bushwacker fender flares and i chanced the front clip to an 1987.i currently have all the parts and it going for paint soon i all i need is the engine to put in when it come back. oh yea i'm putting on 44 tsl super swamper on 15x12 mickey thompson rims. what i want to know is how to make my crate motor to have a rought choppy idle i dont plan on wheeling it either. all the help would be great. i have been thinking of 2.02 camel pump heads and a com cam 286h i want it to sound evil

The 268 cam is a good idea if you want a choppy idle, However, for the rest if you plan to use 44`s you need gears. taller tires change the overall gear ratio. For tires that tall you`ll at least need 4.88 gears to compensate.

Are you looking for performance or just the sound? The 270h sounds good too and will be better for a off-road vehicle such as yours. Its not as choppy as the 286H but you won't have to go with the super low gears to make use of its power range.

trust me it will have go but why put all that money into it and the wheel it and damange all the work that you just did to it

Why put 44s on it if you're not going to wheel it?

With a 290hp 350 and a cam installed just for the rough idle isn't going to have a lot of go in a 5300 lb truck with super heavy 44" tires. If you want go drop in a 454 or put a supercharger on that 350.

well to all here thanks for the so called advice put i just finished the motor today and i had the thing bored out 60 over and put in a carter comp cam in it 300 duration and some really nice afr heads got it dynoed today at making 518 horses and 485 for torque thats running on 100 octane not to bad for a new 350 and as for running 44's why not if yo have the money and i do

Why don`t I believe you? You bought a stock 350, added heads and a cam and your making over 500 horses? bull. The whole combo must work together to make power. You don`t need torque? I hate to be the one to tell you torque is what moves the vehicle not horsepower. Show us the dyno sheet along with proof you added more than just a cam and heads. And by the way, carter don`t make cams, they make carbs and fuel pumps. Hate to be the one that takes a leak in your cornflakes but get real.

Why don`t I believe you? You bought a stock 350, added heads and a cam and your making over 500 horses? bull. The whole combo must work together to make power. You don`t need torque? I hate to be the one to tell you torque is what moves the vehicle not horsepower. Show us the dyno sheet along with proof you added more than just a cam and heads. And by the way, carter don`t make cams, they make carbs and fuel pumps. Hate to be the one that takes a leak in your cornflakes but get real.

OK, that's funnny. There is no way that's a 500HP motor, no fkn way. My gut tells me I know who this is. Someone that's been stalking me around the internet, but I hold out that I can be wrong.....sounds like something he'd say. Probably a troll post. This is the stuff of internet legends. The next post is "I know a guy with XXXXXX intake, cam, carb, heads, lug nuts, (your choice) and he made 500HP with a 350"......the next post somewhere will be you need those parts to make big power......ahhhhh the interweb.

Why don`t I believe you? You bought a stock 350, added heads and a cam and your making over 500 horses? bull. The whole combo must work together to make power. You don`t need torque? I hate to be the one to tell you torque is what moves the vehicle not horsepower. Show us the dyno sheet along with proof you added more than just a cam and heads. And by the way, carter don`t make cams, they make carbs and fuel pumps. Hate to be the one that takes a leak in your cornflakes but get real.

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

Insurance

Please select your insurance company (Optional)

Log-in

User Name

Remember Me?

Password

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.